Kaido's fruit is definitely an Azure Dragon tho. How would you explain the name change it has undergone thanks to the WG?
And why would all of this happen cause of Zoan awakening? Even though Kaido's fruit is the most stat heavy Zoan, it still follows the rules of a Zoan, so it's very predictable what's to come.
Put all of this together with the stuff that WsW talked about and it's much more likely that it's Luffy's fruit that was meant and therefore he's also the one that needs to be eliminated, even if he's right now facing Kaido.
Answer this very simple question
Why didn't Gorosei give such order when Luffy was fighting Crocodile? or Lucci? or invaded Enies Lobby? or Moria? or Kuma? or caused trouble in Sabaody? or Invaded Impel Down? or Marineford? or Doflamingo?
U think it took them years & thousand Chapters to finally figure out Luffy must not be allowed to Fight?
The New Event that Gorosei didn't witness before is Kaidou being close to Death (After he escaped Punk Hazard)
It's possible that Gorosei are afraid of something that might happen if Kaidou dies
For example, it's the only DF in the World which there are Two Copies of (Kaidou & Momo)
So what if when Kaidou dies, his DF doesn't respawn & actually gets absorbed by Momo
What if something Awakens when you mix Two Azure Dragons
What if there is something in Wano that is activated with the Soul of Powerful DF (Which is only available shortly after User dies)
We still don't know the full mystery of Devil Fruits, so you can't just say "Kaidou's DF is just a Zoan"
CP-0 clearly said that they are so lucky Vegapunk's DF was a Failure
Clearly hinting at a Hidden Power that Azure Dragon have
And you think Oda is gonna make Azure Dragon no different than Western Dragons?
So far we've only see him Roar, Breath Fire & Fly, you think that's the limit of what Oda imagined for such Creature?
Not to mention that the guy is heavily inspired by Dragon Ball
Kaidou is a Dragon
Momo is a Dragon
Luffy's Father is named Dragon & his Ship represents an Eastern Dragon
Shanks Ship also shows a Dragon
WG Leaders are called Celestial Dragons who are also treated as Gods
Kaidou's DF was found on God's Valley
... etc
Dragons are clearly special in One Piece, they aren't just Special for their Toughness
Kaidou being presented as Dragon Lord & King of Beasts clearly means that he have a Power that can endanger entire World
Luffy must be stopped at all costs before he triggers such Scenario
Another Hint is Kaidou's Death
You think he will die just like that, Head rolling on the Ground & no one to mourn for him except maybe Calamities
If Kaidou dies then 100% his Soul or DF gonna Activate something that will make them say something like: "What have we done !!!"
After all, the guy said "Only me can change the World"
So i imagine that if Kaidou is prevented from fulfilling his Destiny, something Chaotic is gonna befell the World or at least Wano Country.
Oda is even preparing for this outcome by making Momo hesitant to open the Borders
As for your argument regarding it's Naming
Kaidou's DF is called Fish Fish No Mi Model Blue Dragon, do you see how generic it is?
Just a Fish & named after a Color. Clearly WG don't want people to know that Dragon's True Name
For example, Sengoku's DF is named Buddha, not Golden Human, it's a Unique Name, so Kaidou's DF should follow suit
Also did u notice that Momo's Dragon is Pink? His DF is named "Azure" but he is Pink, don't u find that weird?
He have same Abilities as Kaidou & same Shape, only difference is Color & that made Vegapunk consider it a Failture
So clearly Azure Dragon isn't just some random Mythical Species, it's a Being who can change the World
And it's True Name became a Legend only known to very few
PS: It's obvious that Kaidou must be defeated at all costs, but Oda said that Wano Ending is Unexpected. All this time, we've seen Luffy's Victories make things better & fix problems, but what if this time, there is a Plot Twist & Kaidou's Defeat actually makes things much worse.
Oda also said that after Wano Arc, it's basically Endgame, and i don't think his Defeat is simply gonna start a New Era, cuz we already had that with WB. Not to mention that there is clearly something hidden in Wano, mentioned by Sengoku, Big Mom & Kaidou himself. If this thing never Awakened all this time, doesn't this mean that it requires a Trigger? I'd say it's Kaidou's Death or at least his DF